使用聚焦离子束扫描电子显微镜纳米图形学各种烧结的Ni-SDC陶的微结构重建
Gregor Kapun1, Endre Majorovits2, Sašo Šturm3,4,5
1National Institute of Chemistry, Hajdrihova 19, 1001 Ljubljana, Slovenia.
Materials (Basel, Switzerland)
|July 13, 2024
概括
优化固体氧化物燃料电池阳极需要了解微观结构-拓学联系. 在1200°C下烧结-撒玛利亚合的陶,通过增强活性三相边界长度,产生了最佳性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术纳米技术
背景情况:
- 固体氧化物燃料电池 (SOFCs) 需要优化的阳极材料以获得高效的性能.
- -撒玛利亚合 (Ni-SDC) 陶是有前途的阳极材料.
- 微观结构特征显著影响SOFC阳极性能.
研究的目的:
- 在Ni-SDC陶中,量化关联一阶微观结构参数与二阶拓特征.
- 为了确定作为SOFC阳极使用的Ni-SDC陶的最佳烧结条件.
- 研究微结构对活性三相边界长度 (TPBL) 的影响.
主要方法:
- 在各种烧结温度下 (1100°C1400°C) 制造Ni-SDC陶.
- 使用FIB-SEM纳米图形学进行微结构性表征.
- 先进的图像处理和拓分析,包括对活跃的TPBL的可视化.
- 气体流和压力下降模拟.
主要成果:
- 建立了微观结构和拓特征之间的定量关系.
- 确定了1200°C作为Ni-SDC陶的最佳烧结温度.
- 证明了活性TPB在电极性能中的关键作用,特别是当相不完全透时.
结论:
- 微结构-拓关系对于优化SOFC阳极设计至关重要.
- 在1200°C的烧结提高了Ni-SDC陶微结构,以提高电极性能.
- 了解和控制像主动TPBL这样的拓特征是推进SOFC技术的关键.
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